Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
xuc van » duc van, vuc van, xuc ban
luc van » luoc van, luu van, duc van
hanh va » hang va, hanh vi
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
va cao » va co, va dao, va bao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach v nang xa hoi. hieu ((va cao) or (va cac)) ((xuc van) OR (luc van)) hanh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang xa hoi. hieu ((va cao) OR (va cac)) ((xuc van) OR (luc van)) hanh va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang xa hoi. hieu ((va cao) or (va cac)) ((xuc van) OR (luc van)) hanh va su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang xa hoi. hieu ((va cao) or (va cac)) ((xuc van) OR (luc van)) hanh va su triet*.